PBO纤维表面空气冷等离子体改性

采用等离子体处理方法对PBO(聚对苯撑苯并二 口 恶 唑)纤维表面进行改性。用XPS和AFM测试分析等离子处理时间对PBO纤维表面组成和表面形貌的影响规律;首次采用浸润性测试和IR测试分析等离子体处理前后纤维浸润性和表面官能团的变化。用Microbond测试方法表征了纤维与树脂基体的界面剪切强度,并用SEM观察微复合材料破坏形貌。结果表明:等离子体处理后纤维浸润性得到改善,纤维表面苯环上引入了很多羟基。等离子体处理最佳条件下(170 W,10 min),纤维表面粗糙度最大,纤维表面O元素含量最大, O/C比率提高了50.5 %, IFSS值提高了64.7 %。

AIR COLD PLASMA MODIFICATION ON PBO FIBER SURFACE

In this paper, the modification of plasma treatment on PBO (poly(p-phenylene benzobisoxazole)) fiber surface was studied. AFM and XPS were used to analyze the influences of treating time on the morphology and surface compositions of PBO fiber respectively. The changes of fiber surface wettability and surface groups were determined by dynamic wettability test equipment and IR spectrum. The interfacial shear strength (IFSS) between fibers and resin was measured by the microbond test. The broken composites were analyzed by SEM. The results show that the wettability of the fiber surface after plasma treatment is improved and that many hydroxy groups are introduced to benzene rings on the fiber surface. Under the optimum parameters of 170 W and 10 min,the IFSS is improved by 64.7 %. The surface rough degree and oxygen content are the greatest. The ratio of oxygen to carbon is improved by 50.5 %.